Voltage and frequency monitor for undervoltage, overvoltage, underfrequency, overfrequency, phase sequence, phase failure, asymmetry

LINETRAXX® VMD420 Multi-functional voltage relay for frequency, overvoltage, undervoltage, phase sequence, phase failure and asymmetry monitoring in 3(N)AC systems Device features • Undervoltage, overvoltage and frequency monitoring in 3(N)AC systems 0...500 V • Asymmetry, phase failure and phase sequence monitoring • Various monitoring functions selectable < U, > U, < f, > f • Start-up delay, response delay and delay on release • Adjustable switching hysteresis • r.m.s. value measurement (AC+DC) • Digital measured value display via multi-functional LC display • Preset function (automatic setting...

Operating elements Three-phase voltage and frequency monitor LINETRAXX® VMD420 1 - Power On LED "ON" (green); lights when supply voltage is applied and flashes in the event of system fault alarm 2 - Alarm LED "AL1" (yellow), lights when the set response value >U/<f/>f >f/Asy/PHS is exceeded and flashes in the event of system fault alarm 3 - Alarm LED "AL2" (yellow), lights when the set response value >U/<f/>f >f/Asy/PHS is exceeded and flashes in the event of system fault alarm Arrow up button: to change the measured value display, move upwards in the menu or to change parameters To call up the...

Three-phase voltage and frequency monitor LINETRAXX® VMD420 Z BENDER Ordering information Dimension diagram XM420 Dimensions in mm Technical data Insulation coordination acc. to IEC 60664-1/IEC 60664-3 Rated insulation voltage 400 V Rated impulse voltage/pollution degree 4 kV/III Protective separation (reinforced insulation) between Response values Type of distribution system Undervoltage U < (Alarm 2) (measurement method: 3Ph/3n) AC 6.500/6.288 V Overvoltage U > (Alarm 1) (measurement method: 3Ph/3n) Preset function for 3AC measurement: Supply voltageVMD420-D-1: Supply voltage Us Frequency range...

Three-phase voltage and frequency monitor LINETRAXX® VMD420 Technical data (continued) Specified time Start-up delay t Response delay t0ni/2 Delay on release t0ff Resolution of setting t, toni/2, toff (0.. .10 s) Resolution of setting t, ton1/2, toff (10.99 s) Resolution of setting t, ton1/2, toff (100.300 s) Operating time, voltage tae Operating time, frequency tae Response time tan Recovery time tb Displays, memory Display LC display, multifunctional, not illuminated Display range measured value AC/DC 0.500 V Operating uncertainty, voltage at 50 Hz/60 Hz ±1.5 %, 2 digits Operating uncertainty...

BENDER Group VMD420_D00137_04_D_XXEN / 04.2022 / © Bender GmbH & Co. KG, Germany – Subject to change! The specified standards take into account the edition valid until 04.2022 unless otherwise indicated. Bender GmbH & Co. KG Londorfer Straße 65 • 35305 Grünberg • Germany Tel.: +49 6401 807-0 • [email protected] • www